Intermec EasyCoder PX4i Installation Instructions Manual page 8

12 Connect the dual slot I/O cable to the RFID interface board.
13 Slide the RFID interface board into the printer.
14 Secure the RFID interface board with the two screws you
15 Secure the RFID interface board to the circuit board with the
16 Connect the antenna cable to the RFID interface board.
17 Attach the left side door to the printer.
18 Close the front and right side doors.
8 EasyCoder Printer (PX4i and PX6i) RFID Kit Installation Instructions
Use the connector 1 for slot 1 and connector 2 for slot 2.
removed in Step 9 or with the two included M3x5 screws.
M4x5 screw and spacer screw. For slot 1, use the spacer screw
on the main board. For slot 2, use the spacer screw in the kit.
Connector 2
Connector 1